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Obesity-Related Insulin Resistance: The Central Role of Adipose Tissue Dysfunction

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From Obesity to Diabetes

Abstract

Obesity is a key player in the onset and progression of insulin resistance (IR), a state by which insulin-sensitive cells fail to adequately respond to insulin action. IR is a reversible condition, but if untreated leads to type 2 diabetes alongside increasing cardiovascular risk. The link between obesity and IR has been widely investigated; however, some aspects are still not fully characterized.

In this chapter, we introduce key aspects of the pathophysiology of IR and its intimate connection with obesity. Specifically, we focus on the role of adipose tissue dysfunction (quantity, quality, and distribution) as a driver of whole-body IR. Furthermore, we discuss the obesity-related lipidomic remodeling occurring in adipose tissue, liver, and skeletal muscle. Key mechanisms linking lipotoxicity to IR in different tissues and metabolic alterations (i.e., fatty liver and diabetes) and the effect of weight loss on IR are also reported while highlighting knowledge gaps.

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Correspondence to Amalia Gastaldelli .

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Mocciaro, G., Gastaldelli, A. (2022). Obesity-Related Insulin Resistance: The Central Role of Adipose Tissue Dysfunction. In: Eckel, J., Clément, K. (eds) From Obesity to Diabetes. Handbook of Experimental Pharmacology, vol 274. Springer, Cham. https://doi.org/10.1007/164_2021_573

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